@misc{Fermat_Pierre_de_(1601–1665)_Quatrième_1894,
 author={Fermat, Pierre de (1601–1665) and Tannery, Paul (1843–1904) and Henry, Charles (1859–1926) and Gauthier-Villars},
 copyright={Public Domain},
 address={Paris},
 howpublished={online},
 year={1894},
 publisher={Gauthier-Villars, Imprimeurs-Libraires},
 language={fre},
 title={Quatrième extrait de l'Harmonie universelle de Mersenne},
 type={Text},
 URL={http://rcin.org.pl/Content/179964/PDF/WA35_198457_12629-2_Art9.pdf},
}